NAUI Marine Environment & Ecology

Question 1

Which ocean zone receives sufficient sunlight to support photosynthesis?

Accepted Answer

Euphotic zone

Answer

Abyssal zone

Answer

Bathypelagic zone

Answer

Hadal zone

Question 2

What are the primary producers at the base of most marine food chains?

Accepted Answer

Phytoplankton

Answer

Zooplankton

Answer

Small reef fish

Answer

Sea urchins

Question 3

What is a coral reef primarily composed of?

Accepted Answer

Calcium carbonate skeletons secreted by coral polyps

Answer

Rock formations covered with algae

Answer

Hardened seagrass deposits

Answer

Compressed marine sediment

Question 4

Which type of ecological relationship exists between clownfish and sea anemones?

Accepted Answer

Mutualism

Answer

Parasitism

Answer

Competition

Answer

Predation

Question 5

What is the thermocline?

Accepted Answer

A layer where temperature rapidly decreases with increasing depth

Answer

A layer where salinity rapidly increases with depth

Answer

The boundary between fresh and saltwater

Answer

A zone of maximum biological productivity

Question 6

What type of symbiotic relationship describes one organism benefiting while the other is neither helped nor harmed?

Accepted Answer

Commensalism

Answer

Mutualism

Answer

Parasitism

Answer

Predation

Question 7

What primarily drives surface ocean currents?

Accepted Answer

Wind patterns and differences in water density

Answer

Lunar gravitational pull

Answer

Underwater volcanic activity

Answer

Tidal forces from the sun alone